Warp stop mechanism for looms



April 15, 1930. c. D. BRQWN 1,755,097

' WARP STOP MECHANISM FOR LOOMS I Original] Filed Feb 14, 1928 Hill" I1- Hill /NI/ENTOR" ATTORNEY Patented Apr. 15, 1930 U HQDZ IA CARL 1).BROWN, or HQPED'ALE, MASSACHUSETTS, ASSIGNIOR To DRAPER CORPORA- Tron,or Ho EnALn,'MAssAonus Trs, A oonronArron or MAINE i wAinr s'rorMncHAmsM non LooMs Original, application filed February-1 1, 128, SerialNo, 254,201. Divided and this application filed March j I 14,:1929.serial No. 347,067.

' This invention relates-to warp stop mechanisms for looms and moreparticularly to warp stop mechanism of the transversely movable detectorbar type,'the present appli- *5 cation being filed as aidivisi'on ofapplica-. No. 254,201,1iled February 7 tion, Serial 1928.**" t .7

In warp stop mechanism'of the above'm'entioned type relatively fixed?and; movable =10 toothed detecting bars are employed, and the movabledetecting bar is given'its-detecting movement by an actuator operatedfrom a going part of the loom. It is found desirable at times todisconnect the actuator from its Idetecting bar and'it'has been thegeneralprac tice heretofore to detachably'connectthe actuator anddetecting barby a link having an open-ended slot to engageajpin fonthede tecting bar. -This construction, however, is

open to thexobjection that theloomattendant while piecing up warpthreads or working about the stop motion is liable to accidentallydetach the connection between the actuator anddetecting bar, and thepresentinvention seeks to avoid this accidental detachment by Iproviding' a lo'ck'which will afford protection against accidentaldisconnection and yet permit intentional disconnection of the actuatorand detecting bar. I V The invention and novel features thereof willbest be made clear from the following, description and the accompanyingdrawings of one good formthereof. I In the drawings; I I V Fig. 1 is'anelevat-ionfofwarp stop mechanism embodying the presentinvention,"some of the parts being shown'in section and one I of thedrop wires being shown as arresting a detecting bar; I

'40 Fig. 2 is a sectional side elevation with some parts omitted,showing more particu larly the yieldingly mounted bar actuator connectedto it s'detecting bar and'the stop bars embracing the actuator; and I IFig. 3is-a section on the line 33 of Fig. 2, showing thepmanuallyoperable slide in its detaching position; 1 i

' As is usual in warp stop mechanism of the transversely I movabledetecting bar type, a bracket. is secured to each side of the loom Y forsupporting the warp stop mechanism, and

in the present instance of the invention the loom'frame is providediateach side thereof 2 with a support 1 fora bracket 2 which may beadjustably's'e'cured in place by the bolts3. "The bracket 2 has anupstanding portion 4-.

to which the side member 5 of the warp stop mechanism is secured by oneor more bolts 6. Extending between the side members 5 atOPPOSltGlSldGSOf the loom are the warpv supports 7 of which there maybeany de sired 'numbeu The parts so far described are I I of usualconstruction and need'no further,

description. I t I Extending between the side members 5 are thefixedtoothed detecting'bars 8 each of which has associated with it atransversely tectingbars appropriate to'the character of the loom inuse: and number of warp threads." The ends of the fixed detecting bars 8are firmly'but're'movably secured to the support ing brackets 5 by thecla'mpingbars 1O having the securing bolts 11. The fixed andmov abledetectingfbars are provided {with the V usual teeth adapted to receivebetween'them a fallen drop wire 12 when the warp thread 'which normallysupports each drop wire breaks or becomes too slack, the arrangement 7being suchthat the back and forth movement which is impartedto'thedetecting bar 9 during the norm al operation of the loom will bearrested byithe fallen drop 'wireto thereby effect loom stoppagej II"While different forms of mechanism may 'be employed forimparting thedetecting movements tothe transversely movable-bars is disclosed in'theapplication of which this 9, one good practical construction to this endis a division, and maybe briefly described shaft may bereadily'aifectedby alocking screw 16, the construction being such thatas the rockshaft is given itsrocking movement,

ers 15 is a detecting bar actuator 18, each of which has two pins 19 onits lower portion adapted to be seated in the fulcrum recesses 17 of theassociated rocker 15, and the ac tuator supporting pins 19 are normallyheld seated in the fulcrum recesses 17 of the asso ciated rocker by aspring 20 connected-atits upperend to the actuator 18, as'by a pin 21,and at its lower end to a part 22 carried by the associated rocker. Eachof the detecting bar actuators 18 is connected to its associated are thestop bar carriers 23, two at each side of the warp stop mechanism, asshown. EX- tending' between the stop bar carriers 23 are the stop bars24 which may be rigidly se- 7 cured to the associated carriers by meansof the set screws 25, and the stop bars 24 normally embrace the actuatoror series of actuators 18, one bar being positioned at each side of theactuators, and, as willpresently appear, yielding means are provided forholding the stop bars 24 in the described relation to the actuators. y r1 One of the stop bars 24 has secured thereto the link 26 which isprovided with a slot 27 into which the opposite or companion stop bar 24extends. 7

Mounted in the slotted portion of the link 26 is a plunger 28 which isnormally under the influence of a spring 29 v which serves to hold theend of the plunger against the stop bar 24 in the slot of the link, withthe result that the two stop bars disposed at opposite sides of theactuators 18 are held in yielding relation against the opposite sides ofthe actuator or actuators. The plunger 28 may be appropriately carriedby a sleeve 30 which may be secured by a set screw '31 to the link 26,andbearing upon the enlarged portion 32 of the plunger is the endof aflexible sheathed wire 33, which serves to transmit longitudinalmovement of the plunger to thereby call into action the stop mechanism.The details of the stop mechanism are not herein shown, asthey may be ofany appro priate character, as, for instance, that disclosed in thepatent to HarryA. Davis and Arthur S. Johnson, No. 1,538,625, dated May19, 19 25, i r

actuator 18 will likewise be arrested, while From the construction thusfar described it will be apparent that should one of the detecting baractuators be arrested in its movement, it will act through one of thestop bars 24 to arrest such stop bar, whereupon the other stop bar whichis moved by the actuators will act either through the link 26 or thestop bar in the slot of the link to cause relative movement of theplunger and link to thereby move the sheathed wire33 and eifect loomstoppage, as more fully set forth in'the parent applicationabove'referred to.

relates more particularly'tomeans forsecuring and'locking the actuator18 to the transversely movable toothed detecting bar 9, so thatalldanger of theserparts being accidentally disengaged is avoided. Thismechanism may take various forms but as illustrated in the presentinstance of the invention, the actuator 18 is provided with a manuallyoperable slide 34, the lower end portion of whichis bifurcated, as at35, to engage a pin 36 rigidly secured to the movable detectingbar 9,the construction being such that when the slide 34 is moved downwardlyrelative to the actuator upon which it is mounted, the bifurcated end 35will engage the pin-36 and upon movement of the actuator will impartmovement to the detecting bar 9.' g

As will beapparent fromFigs. 2 and 3, the actuator 18 is provided withthe pins 37 which engage the elongated slots 38 inthe slide 34 and thesepins are provided with enlarged overlapping heads 39 adapted to retainthe slide 34 in sliding engagement with the ac As above indicated, thepresent invention tuator 18. WVhen the slide 34"ismoved downwardly intoengagement with thepin 36 of the associated detecting bar, it is,important that such connection be not accidentally disturbed by the loomattendantin piecing up provided upon the slide34 which may be r 1constitutedas a ball or sphere held in a recess formed in the slide 34.This projection or "ball is adapted to engage either. one of thetwoopenings 41, 42 formed in a strap or blade 43 which overlies theprojection or ball 40 carried by the slide, and the strap is held infixed position relative to the slide by engaging beneath the enlargedheads 39 of the pins 37'. The strap 43 is appropriately formedas a leafspring, with the result that when theslide 34 is in its upperposition,as

indicated inFig. 3, and the ball 40 is engaged with the upper-opening 41in'the strap, the slide will. be firmly held in its inactive position,thus freeing the connection between the actuator anditsassoeiateddetecting-bar5 similarly, when the slide 34 is in-its loweredposition, as indicated in Fig. 2, to which it may be'readilymoved bymanual effort, the

I ball 40 will engage the lower opening in the strap and maintaintheactuator locked to its detecting bar.

' From the construction described it will be apparent that accidentaldisconnection be- I tween the actuator and its toothed detecting andwhen disconnected the manually oper-,

' the slots in the slide, the upper onepreferably bar Will-bepreventedby the manually operable slide and lock associated. therewithto hold the slide in engagement with the pin 36,

able slide will be held'by the lock in its inactive position. r

- The movement of the slide to and from its locking position is limitedby the length of as shown, in connection with the pin or pins securedtothe actuator and when any one of the slides in a plural bank warpst0p-mo-. tion is' raised to disconnect the actuator from the associateddetecting barthe fact is ob servable by the top'po'rtion of the-slideprowhether or not any bank of the warp stop jecting above the companionslides, so that the loom attendant is at-once informed of motion isfunctionally inoperative.

' Any suitable means maybe employed for imparting to the rock shaftll-and'the rockers 15 the desired rocking movement, but in the presentinstance of the invention the rock shaft 14 has secured thereto, an arm44,the

outer end portion of which is provided with a slot whichis engaged bya'pin'46 con as such details form'no part of the present invention theyare not herein further described and are, moreover, well-known in theart. 7

What is claimed is: 1 Inawarp stop mechanism forlooms, the combinationof aseries of drop wires, a transversely movable detecting bar, adetecting bar actuator,'means for connecting the bar is arrested by adrop wire.

bar actuator and thedetectingbar, a lock which operates automatically assaid con necting means is moved 1nto connecting po-.

sition to prevent accidental disengagement between said connecting meansand the transverselymovable detecting bar, and means for efiecting loomstoppage when the detecting 2. In awarpstop' mechanism for looms, thecombination of a series of'drop wires, a transversely movable detectingbar, a yieldingly operated detecting bar actuator, manually actuatedmeansgfor detachably connect ing the actuator and detecting bar, alockoperated automatically'by manual actuation of the connecting meanstoprevent accidental stoppage when the detecting bar is arrested by a dropwire. ,7 u r 1 3. In a warp stopmechanism for looms,

the combination of a series of drop wires, a transversely movable.detecting bar, a de-V tecting bar'actuator, andmeans for detachablyconnecting the actuator and detecting bar,and a friction lock whichoperates automatically asv the, actuator and detecting bardisconnection, and means for effecting loom v are connected by saidmeans to prevent accidental disconnection, r I, r 4. In a warp stopmechanism for looms, the combination ofa'series of drop wires, atransversely movable detecting bar, a de-.

'tecting' bar; actuator, a member fordetachably connecting the actuatorand detecting bar andmounted on one of them for'relative movement intoand outofconnecting position, and an automatically operable lock-for.

preventing accidental movement-of said member out ofconnectingposition5. In a warp stop mechanism-forilooms,

the combination ofa series of dropwires, a

transversely-movabledetecting bar, :a detecting bar actuator, and meansfor detachably connecting the actuator and. detectingbar including aslide mounted for manual sliding movement upon the actuator into and outof engagement with the detecting bar and a lock, which operatesautomaticallyas the slide is manually moved into engagement with thedetecting bar to prevent accidental disengagement of the slide anddetecting bar.

6. In a warp stop mechanism for looms, the combmation of a series ofdrop wires, a

transversely movable detecting bar, a-detecting bar actuator, means fordetachably connecting theactuator and detecting bar including a membermounted for longitudinal sliding movement upon the actuator into and outof engagement. with the detecting bar and a friction lock which operatesautomatically to lock the sliding member fromaccidental movement intoand out of engagement with the detecting bar. I

7. In a. warp stop mechanism for looms, I the combination of'a series ofdrop wires, a transversely movable detecting bar having a projectionthrough. which operative movement is imparted to the bar, a detectingbar actuator,an'd means for detachably connecting the actuator anddetecting bar including a slide Tmounted upon said actuator for slid ingmovement longitudinally along the actuator into and out of engagementwith said projection. I I V I I 8. In a'warp stop mechanism for, looms,

the combination of a transversely movable ment with the detecting bar,connections betweensaid means and the actuator for limit ing themovement of said means into andout of operative relation Withthedetecting bar, and alock for holding said means in either of its twopositions. 7

9. In a Warp stop mechanism for'looms, the combination of a transverselymovable detecting .bar, a bar actuator, a connector mounted on theactuator andmovable longitudinally on the actuator into and out ofoperative engagement with the detecting bar, and locking meansbetweenthe connector and actuator acting automatically as the connectoris moved into operative engagement with the detector bar for holding theconnector in operative engagement with the detecting bar. r

10. In a warp stop mechanism for looms, the combination of atransversely movable detecting bar, a bar actuator, a connectorconstituted as a slide mounted upon the actuator for longitudinalmovementrelative thereto-into and out of engagement With the detectingbar and having'its end extending above the actuator to constituteasignal when the slide is disengaged from the detecting bar, and a lockfor holding the slide in either of its tWo positions. v

In testimony whereof, I have signed my 7 name to this specification.

I CARL D. BROl/VN;

